The Family Ephemeridae, also known as the Mayfly family, belongs to the order Ephemeroptera. These aquatic insects are characterized by having transparent wings, large compound eyes, and short antennae. They are an important part of the aquatic ecosystem, serving as a food source for fish and birds. Other synonyms for the Family Ephemeridae include the Mayfly family, ephemera, shadfly, fishfly, and up-winged fly. They are commonly found near bodies of water such as rivers, streams, and lakes, and their populations can be used as indicators of water quality. Due to their short lifespan, which often only lasts a few hours to a few days, they are also known as "one-day insects".